Struct Font 

pub struct Font { /* private fields */ }

A loaded, shapeable font face.

Implementations

impl Font

pub fn from_bytes(bytes: Vec<u8>) -> Result<Self, FontError>

Load a font from sfnt bytes (TrueType, OpenType/CFF, or TrueType Collection — the first face of a collection is used).

pub fn system_default() -> Option<Self>

Probe common operating-system font directories and load the first usable sans-serif face. Returns None if none is found.

Intended for examples and tests; shipping apps should bundle or explicitly locate their fonts and use Font::from_bytes.

pub fn ascent(&self, size_px: f64) -> f64

Distance from the top of the text box to the baseline, in logical pixels, at size_px.

pub fn line_height(&self, size_px: f64) -> f64

Full line height (ascent + descent + line gap) at size_px.

pub fn measure(&self, text: &str, size_px: f64) -> Size

Measure the rendered size of text at size_px: the widest line’s advance width × the number of newline-separated lines times line height. A trailing newline counts as an extra (empty) line.

pub fn wrap(&self, text: &str, size_px: f64, max_width: f64) -> Vec<String>

Greedily wrap text to lines no wider than max_width logical pixels at size_px, breaking at spaces. Existing \n are hard breaks. A single word wider than max_width is kept on its own (over-long) line rather than split mid-word. Returns at least one line.

Trait Implementations

impl Debug for Font

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.